mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-12-15 08:20:16 +08:00
436a2956d8
comment line where output as too long, and update typedefs for /lib directory. Also fix case where identifiers were used as variable names in the backend, but as typedefs in ecpg (favor the backend for indenting). Backpatch to 8.1.X.
391 lines
8.2 KiB
C
391 lines
8.2 KiB
C
/*
|
|
* default word parser
|
|
* Teodor Sigaev <teodor@sigaev.ru>
|
|
*/
|
|
#include "postgres.h"
|
|
|
|
#include "utils/builtins.h"
|
|
|
|
#include "dict.h"
|
|
#include "wparser.h"
|
|
#include "common.h"
|
|
#include "ts_cfg.h"
|
|
#include "wordparser/parser.h"
|
|
#include "wordparser/deflex.h"
|
|
|
|
PG_FUNCTION_INFO_V1(prsd_lextype);
|
|
Datum prsd_lextype(PG_FUNCTION_ARGS);
|
|
|
|
Datum
|
|
prsd_lextype(PG_FUNCTION_ARGS)
|
|
{
|
|
LexDescr *descr = (LexDescr *) palloc(sizeof(LexDescr) * (LASTNUM + 1));
|
|
int i;
|
|
|
|
for (i = 1; i <= LASTNUM; i++)
|
|
{
|
|
descr[i - 1].lexid = i;
|
|
descr[i - 1].alias = pstrdup(tok_alias[i]);
|
|
descr[i - 1].descr = pstrdup(lex_descr[i]);
|
|
}
|
|
|
|
descr[LASTNUM].lexid = 0;
|
|
|
|
PG_RETURN_POINTER(descr);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(prsd_start);
|
|
Datum prsd_start(PG_FUNCTION_ARGS);
|
|
Datum
|
|
prsd_start(PG_FUNCTION_ARGS)
|
|
{
|
|
PG_RETURN_POINTER(TParserInit((char *) PG_GETARG_POINTER(0), PG_GETARG_INT32(1)));
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(prsd_getlexeme);
|
|
Datum prsd_getlexeme(PG_FUNCTION_ARGS);
|
|
Datum
|
|
prsd_getlexeme(PG_FUNCTION_ARGS)
|
|
{
|
|
TParser *p = (TParser *) PG_GETARG_POINTER(0);
|
|
char **t = (char **) PG_GETARG_POINTER(1);
|
|
int *tlen = (int *) PG_GETARG_POINTER(2);
|
|
|
|
if (!TParserGet(p))
|
|
PG_RETURN_INT32(0);
|
|
|
|
*t = p->lexeme;
|
|
*tlen = p->lenbytelexeme;
|
|
|
|
PG_RETURN_INT32(p->type);
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(prsd_end);
|
|
Datum prsd_end(PG_FUNCTION_ARGS);
|
|
Datum
|
|
prsd_end(PG_FUNCTION_ARGS)
|
|
{
|
|
TParser *p = (TParser *) PG_GETARG_POINTER(0);
|
|
|
|
TParserClose(p);
|
|
PG_RETURN_VOID();
|
|
}
|
|
|
|
#define LEAVETOKEN(x) ( (x)==12 )
|
|
#define COMPLEXTOKEN(x) ( (x)==5 || (x)==15 || (x)==16 || (x)==17 )
|
|
#define ENDPUNCTOKEN(x) ( (x)==12 )
|
|
|
|
|
|
#define TS_IDIGNORE(x) ( (x)==13 || (x)==14 || (x)==12 || (x)==23 )
|
|
#define HLIDIGNORE(x) ( (x)==5 || (x)==13 || (x)==15 || (x)==16 || (x)==17 )
|
|
#define HTMLHLIDIGNORE(x) ( (x)==5 || (x)==15 || (x)==16 || (x)==17 )
|
|
#define NONWORDTOKEN(x) ( (x)==12 || HLIDIGNORE(x) )
|
|
#define NOENDTOKEN(x) ( NONWORDTOKEN(x) || (x)==7 || (x)==8 || (x)==20 || (x)==21 || (x)==22 || TS_IDIGNORE(x) )
|
|
|
|
typedef struct
|
|
{
|
|
HLWORD *words;
|
|
int len;
|
|
} hlCheck;
|
|
|
|
static bool
|
|
checkcondition_HL(void *checkval, ITEM * val)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ((hlCheck *) checkval)->len; i++)
|
|
{
|
|
if (((hlCheck *) checkval)->words[i].item == val)
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
static bool
|
|
hlCover(HLPRSTEXT * prs, QUERYTYPE * query, int *p, int *q)
|
|
{
|
|
int i,
|
|
j;
|
|
ITEM *item = GETQUERY(query);
|
|
int pos = *p;
|
|
|
|
*q = 0;
|
|
*p = 0x7fffffff;
|
|
|
|
for (j = 0; j < query->size; j++)
|
|
{
|
|
if (item->type != VAL)
|
|
{
|
|
item++;
|
|
continue;
|
|
}
|
|
for (i = pos; i < prs->curwords; i++)
|
|
{
|
|
if (prs->words[i].item == item)
|
|
{
|
|
if (i > *q)
|
|
*q = i;
|
|
break;
|
|
}
|
|
}
|
|
item++;
|
|
}
|
|
|
|
if (*q == 0)
|
|
return false;
|
|
|
|
item = GETQUERY(query);
|
|
for (j = 0; j < query->size; j++)
|
|
{
|
|
if (item->type != VAL)
|
|
{
|
|
item++;
|
|
continue;
|
|
}
|
|
for (i = *q; i >= pos; i--)
|
|
{
|
|
if (prs->words[i].item == item)
|
|
{
|
|
if (i < *p)
|
|
*p = i;
|
|
break;
|
|
}
|
|
}
|
|
item++;
|
|
}
|
|
|
|
if (*p <= *q)
|
|
{
|
|
hlCheck ch;
|
|
|
|
ch.words = &(prs->words[*p]);
|
|
ch.len = *q - *p + 1;
|
|
if (TS_execute(GETQUERY(query), &ch, false, checkcondition_HL))
|
|
return true;
|
|
else
|
|
{
|
|
(*p)++;
|
|
return hlCover(prs, query, p, q);
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
PG_FUNCTION_INFO_V1(prsd_headline);
|
|
Datum prsd_headline(PG_FUNCTION_ARGS);
|
|
Datum
|
|
prsd_headline(PG_FUNCTION_ARGS)
|
|
{
|
|
HLPRSTEXT *prs = (HLPRSTEXT *) PG_GETARG_POINTER(0);
|
|
text *opt = (text *) PG_GETARG_POINTER(1); /* can't be toasted */
|
|
QUERYTYPE *query = (QUERYTYPE *) PG_GETARG_POINTER(2); /* can't be toasted */
|
|
|
|
/* from opt + start and and tag */
|
|
int min_words = 15;
|
|
int max_words = 35;
|
|
int shortword = 3;
|
|
|
|
int p = 0,
|
|
q = 0;
|
|
int bestb = -1,
|
|
beste = -1;
|
|
int bestlen = -1;
|
|
int pose = 0,
|
|
posb,
|
|
poslen,
|
|
curlen;
|
|
|
|
int i;
|
|
int highlight = 0;
|
|
|
|
/* config */
|
|
prs->startsel = NULL;
|
|
prs->stopsel = NULL;
|
|
if (opt)
|
|
{
|
|
Map *map,
|
|
*mptr;
|
|
|
|
parse_cfgdict(opt, &map);
|
|
mptr = map;
|
|
|
|
while (mptr && mptr->key)
|
|
{
|
|
if (pg_strcasecmp(mptr->key, "MaxWords") == 0)
|
|
max_words = pg_atoi(mptr->value, 4, 1);
|
|
else if (pg_strcasecmp(mptr->key, "MinWords") == 0)
|
|
min_words = pg_atoi(mptr->value, 4, 1);
|
|
else if (pg_strcasecmp(mptr->key, "ShortWord") == 0)
|
|
shortword = pg_atoi(mptr->value, 4, 1);
|
|
else if (pg_strcasecmp(mptr->key, "StartSel") == 0)
|
|
prs->startsel = pstrdup(mptr->value);
|
|
else if (pg_strcasecmp(mptr->key, "StopSel") == 0)
|
|
prs->stopsel = pstrdup(mptr->value);
|
|
else if (pg_strcasecmp(mptr->key, "HighlightAll") == 0)
|
|
highlight = (
|
|
pg_strcasecmp(mptr->value, "1") == 0 ||
|
|
pg_strcasecmp(mptr->value, "on") == 0 ||
|
|
pg_strcasecmp(mptr->value, "true") == 0 ||
|
|
pg_strcasecmp(mptr->value, "t") == 0 ||
|
|
pg_strcasecmp(mptr->value, "y") == 0 ||
|
|
pg_strcasecmp(mptr->value, "yes") == 0) ?
|
|
1 : 0;
|
|
|
|
pfree(mptr->key);
|
|
pfree(mptr->value);
|
|
|
|
mptr++;
|
|
}
|
|
pfree(map);
|
|
|
|
if (highlight == 0)
|
|
{
|
|
if (min_words >= max_words)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("MinWords should be less than MaxWords")));
|
|
if (min_words <= 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("MinWords should be positive")));
|
|
if (shortword < 0)
|
|
ereport(ERROR,
|
|
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
|
|
errmsg("ShortWord should be >= 0")));
|
|
}
|
|
}
|
|
|
|
if (highlight == 0)
|
|
{
|
|
while (hlCover(prs, query, &p, &q))
|
|
{
|
|
/* find cover len in words */
|
|
curlen = 0;
|
|
poslen = 0;
|
|
for (i = p; i <= q && curlen < max_words; i++)
|
|
{
|
|
if (!NONWORDTOKEN(prs->words[i].type))
|
|
curlen++;
|
|
if (prs->words[i].item && !prs->words[i].repeated)
|
|
poslen++;
|
|
pose = i;
|
|
}
|
|
|
|
if (poslen < bestlen && !(NOENDTOKEN(prs->words[beste].type) || prs->words[beste].len <= shortword))
|
|
{
|
|
/* best already finded, so try one more cover */
|
|
p++;
|
|
continue;
|
|
}
|
|
|
|
posb = p;
|
|
if (curlen < max_words)
|
|
{ /* find good end */
|
|
for (i = i - 1; i < prs->curwords && curlen < max_words; i++)
|
|
{
|
|
if (i != q)
|
|
{
|
|
if (!NONWORDTOKEN(prs->words[i].type))
|
|
curlen++;
|
|
if (prs->words[i].item && !prs->words[i].repeated)
|
|
poslen++;
|
|
}
|
|
pose = i;
|
|
if (NOENDTOKEN(prs->words[i].type) || prs->words[i].len <= shortword)
|
|
continue;
|
|
if (curlen >= min_words)
|
|
break;
|
|
}
|
|
if (curlen < min_words && i >= prs->curwords)
|
|
{ /* got end of text and our cover is shoter
|
|
* than min_words */
|
|
for (i = p; i >= 0; i--)
|
|
{
|
|
if (!NONWORDTOKEN(prs->words[i].type))
|
|
curlen++;
|
|
if (prs->words[i].item && !prs->words[i].repeated)
|
|
poslen++;
|
|
if (NOENDTOKEN(prs->words[i].type) || prs->words[i].len <= shortword)
|
|
continue;
|
|
if (curlen >= min_words)
|
|
break;
|
|
}
|
|
posb = (i >= 0) ? i : 0;
|
|
}
|
|
}
|
|
else
|
|
{ /* shorter cover :((( */
|
|
for (; curlen > min_words; i--)
|
|
{
|
|
if (!NONWORDTOKEN(prs->words[i].type))
|
|
curlen--;
|
|
if (prs->words[i].item && !prs->words[i].repeated)
|
|
poslen--;
|
|
pose = i;
|
|
if (NOENDTOKEN(prs->words[i].type) || prs->words[i].len <= shortword)
|
|
continue;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (bestlen < 0 || (poslen > bestlen && !(NOENDTOKEN(prs->words[pose].type) || prs->words[pose].len <= shortword)) ||
|
|
(bestlen >= 0 && !(NOENDTOKEN(prs->words[pose].type) || prs->words[pose].len <= shortword) &&
|
|
(NOENDTOKEN(prs->words[beste].type) || prs->words[beste].len <= shortword)))
|
|
{
|
|
bestb = posb;
|
|
beste = pose;
|
|
bestlen = poslen;
|
|
}
|
|
|
|
p++;
|
|
}
|
|
|
|
if (bestlen < 0)
|
|
{
|
|
curlen = 0;
|
|
for (i = 0; i < prs->curwords && curlen < min_words; i++)
|
|
{
|
|
if (!NONWORDTOKEN(prs->words[i].type))
|
|
curlen++;
|
|
pose = i;
|
|
}
|
|
bestb = 0;
|
|
beste = pose;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bestb = 0;
|
|
beste = prs->curwords - 1;
|
|
}
|
|
|
|
for (i = bestb; i <= beste; i++)
|
|
{
|
|
if (prs->words[i].item)
|
|
prs->words[i].selected = 1;
|
|
if (highlight == 0)
|
|
{
|
|
if (HLIDIGNORE(prs->words[i].type))
|
|
prs->words[i].replace = 1;
|
|
}
|
|
else
|
|
{
|
|
if (HTMLHLIDIGNORE(prs->words[i].type))
|
|
prs->words[i].replace = 1;
|
|
}
|
|
|
|
prs->words[i].in = (prs->words[i].repeated) ? 0 : 1;
|
|
}
|
|
|
|
if (!prs->startsel)
|
|
prs->startsel = pstrdup("<b>");
|
|
if (!prs->stopsel)
|
|
prs->stopsel = pstrdup("</b>");
|
|
prs->startsellen = strlen(prs->startsel);
|
|
prs->stopsellen = strlen(prs->stopsel);
|
|
|
|
PG_RETURN_POINTER(prs);
|
|
}
|